ACPI / scan: Move sysfs-related device code to a separate file

To reduce the size of scan.c and improve the readability of it, move
all code related to device sysfs, modalias creation etc. to a new
file called device_sysfs.c.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

diff --cc drivers/acpi/Makefile
Simple merge

diff --cc drivers/acpi/device_sysfs.c
Simple merge

diff --cc drivers/acpi/internal.h
Simple merge

diff --cc drivers/acpi/scan.c
Simple merge